Jeremy Zawodny, MySQL guru, tells a story about:

One of the frustrating things about building and running backend infrastructure services is that things break sometimes — often in unexpected ways. And when they do, you can spend untold hours chasing down various ideas, most of which are dead ends, before eventually solving the problem.

He starts with a curious MySQL login failure and ends up with IRQs and boot time kernel options.

Scary.

Read the story here: part I, part 2.

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